CN111346022A

CN111346022A - Light-sensitive sun-proof pressed powder

Info

Publication number: CN111346022A
Application number: CN202010193792.4A
Authority: CN
Inventors: 刘书; 邓伟健; 林锦雄
Original assignee: Guangzhou Aibei Biological Technology Co Ltd
Current assignee: Guangzhou Aibei Biological Technology Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-06-30

Abstract

The invention discloses a light-sensitive sun-proof pressed powder which comprises the following components in percentage by weight: 4-16% of light sensitive titanium dioxide and 1-4% of nano zinc oxide; the light-sensitive titanium dioxide is a mixture of nano-scale titanium dioxide, ferric oxide and hydrogenated polydimethylsiloxane. The light-sensitive sunscreen pressed powder is compounded by titanium dioxide and zinc oxide, has an excellent sunscreen effect, can automatically adjust the color of powder according to ambient lighting conditions, and avoids that the makeup color is white and bright, and the makeup color made up can be changed along with the change of light intensity.

Description

Light-sensitive sun-proof pressed powder

Technical Field

The invention relates to the technical field of cosmetics, and particularly relates to a light-sensitive sunscreen pressed powder.

Background

The powder cake can be used for face concealer, color endowment, and decoration. The pressed powder sold in the market at present has a good sunscreen effect, and a satisfactory makeup color is formed by using the pressed powder in a makeup room, and the makeup color feels very white and shiny under the strong light irradiation outdoors.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a light-sensitive sunscreen pressed powder.

In order to achieve the purpose, the invention adopts the technical scheme that: the light-sensitive sun-proof pressed powder comprises the following components in percentage by weight: 4-16% of light sensitive titanium dioxide and 1-4% of nano zinc oxide; the light-sensitive titanium dioxide comprises nano-scale titanium dioxide, ferric oxide and hydrogenated polydimethylsiloxane.

The light-sensitive sunscreen pressed powder is compounded by adopting the light-sensitive titanium dioxide and the zinc oxide according to the proportion, has an excellent sunscreen effect, can automatically adjust the color of powder according to ambient light conditions, and avoids that the makeup color is white and bright, and the makeup color made up can be changed along with the change of the light intensity.

The light-sensitive titanium dioxide is prepared from nano-scale titanium dioxide, ferric oxide and hydrogenated polydimethylsiloxane, and the brightness of the raw material can be changed along with the change of the illumination intensity. When added to the pressed powder, the light-sensitive titanium dioxide may be surface treated with polydimethylsiloxane. The light-sensitive titanium dioxide is nano-scale titanium dioxide, the preferable particle size D50 is smaller than 100nm, the nano-zinc oxide is nano-scale zinc oxide, and the preferable particle size D50 is smaller than 50 nm.

Preferably, the light sensation sun-protection pressed powder comprises the following components in percentage by weight: 6-10% of light-sensitive titanium dioxide and 1-3% of zinc oxide. When the light-sensitive titanium dioxide and the nano zinc oxide are mixed according to the proportion, the sun-screening effect is better, and the makeup feeling is more natural under light. More preferably, the light-sensitive sunscreen pressed powder comprises the following components in percentage by weight: 8% of light-sensitive titanium dioxide and 2% of nano zinc oxide.

Preferably, the light-sensitive sun-proof pressed powder further comprises the following components in percentage by weight: 0.5-2% of ethylhexyl methoxycinnamate, 0.5-2% of isoamyl p-methoxycinnamate and 0.5-2% of hexyl diethylamino hydroxybenzoyl benzoate. The three chemical sun-screening agents are also added into the pressed powder, and the three chemical sun-screening agents are compounded with the light-sensitive titanium dioxide and the nano zinc oxide, so that the pressed powder has a sun-screening effect.

More preferably, the light-sensation sun-screening pressed powder further comprises the following components in percentage by weight: ethylhexyl methoxycinnamate 1%, isoamyl p-methoxycinnamate 1% and hexyl diethylamino hydroxybenzoyl benzoate 1%. When the three chemical sun-screening agents are mixed according to the proportion, the sun-screening effect is better.

Preferably, the light-sensitive titanium dioxide comprises the following components in percentage by weight: 92.15-96.03% of nano-scale titanium dioxide, 0.97-4.85% of ferric oxide and 3% of hydrogenated polydimethylsiloxane.

Preferably, the light-sensitive sun-proof pressed powder further comprises the following components in percentage by weight: 30-50% of talcum powder, 10-45% of mica and 2-20% of silica. The powder cake is added with the skin feel conditioning agent in the proportion, so that the powder cake has good skin feel and skin sticking performance.

Preferably, the light-sensitive sunscreen compact further comprises 4-16% of glycerol tri (ethyl hexanoate). The addition of the glycerol tri (ethyl hexanoate) ester to the pressed powder can increase the skin-moistening performance of the pressed powder.

Preferably, the light sensation sun-protection pressed powder further comprises 0.02-0.5% of tocopherol acetate. The tocopheryl acetate has antioxidant effect, and can prevent rancidity and oxidation of oil in the pressed powder.

Preferably, the light-sensitive sunscreen compact further comprises a colorant, a binder, and a preservative.

Preferably, the binder is magnesium stearate.

Preferably, the preservative is a mixture of phenoxyethanol and ethylhexyl glycerin. Preferably, the weight ratio of phenoxyethanol to ethylhexyl glycerol is: 9: 1. the phenoxyethanol is stable below 80 ℃ and has the effect of inhibiting bacteria, and the ethylhexyl glycerin has antibacterial property and strong stability, so the compounding with the phenoxyethanol can enhance the effect and reduce the dosage.

The invention has the beneficial effects that: the light-sensitive sunscreen pressed powder is compounded by titanium dioxide and zinc oxide, has an excellent sunscreen effect, can automatically adjust the color of powder according to ambient lighting conditions, and avoids that makeup color is white and bright, and the makeup color made up can be changed along with the change of light intensity.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.

In the examples and comparative examples, the raw materials were purchased from the market, wherein the light-sensitive titanium dioxide was obtained from not two fine chemical industries, Inc., having FFA-LSPP-3SS and FFA-LSPY-3SS, the FFA-LSPP-3SS contained 92.15-96.03% of titanium dioxide, 0.97-4.85% of iron oxide red, and 3% of hydrogenated polydimethylsiloxane, and the FFA-LSPY-3SS contained 92.15-96.03% of titanium dioxide, 0.97-4.85% of iron oxide yellow, and 3% of hydrogenated polydimethylsiloxane.

Zinc oxide was purchased from advanced chemical company under the product model SUNZNO-NAS, preservative was a mixture of phenoxyethanol and ethylhexylglycerin, purchased from Shumei company under the product model Euxyl PE 9010.

The formulation of the pressed powder described in examples 1 to 8 and comparative examples 1 to 2 is shown in Table 1, and the preparation method of the pressed powder comprises the following steps:

1. adding the raw materials with the serial numbers of 1-10 into a powder grinding machine and stirring for 5 minutes;

2. opening the cover and brushing the powder on the cover and the wall into the machine, and stirring for 5 minutes;

3. mixing 11-16, spraying the uniformly mixed liquid into a machine, and stirring for 3 minutes;

4. opening the cover and brushing the powder on the cover and the wall into the machine, and stirring for 1 minute;

5. passing the stirred powder through a jet mill for 2 times;

6. and (3) sieving the air-blown powder by using a 120-mesh sieve, standing for a period of time, controlling the pressure, time and frequency of a machine, and pressing into a pressed powder to obtain the pressed powder.

TABLE 1

Example 9

The cakes described in examples 1-8 and comparative examples 1-2 were tested for PFA value as follows

1. 100 healthy people of 10-60 years old are selected, and the healthy people can be male and female.

2. The test part is selected from the back, and the skin of the test part has uniform color and no pigmented nevus, color spots and the like.

3. The dosage is about 2mg/cm²And the powder is accurately and uniformly applied to the skin to be tested. And marked near the tested part, the tested skin is about 30cm²。

4. And (3) continuously filtering ultraviolet rays with the wavelength shorter than 320nm and visible light and infrared rays with the wavelength longer than 400nm by using a proper optical filter for 2-4 hours in a UVA region emitting near sunlight.

5. And (2) regularly detecting and maintaining according to the conditions, recording a regular detection result, selecting a fixed time point within 2-4 hours after observation and exposure when MPPD (MPPD refers to minimum continuous blackening quantity, namely the minimum ultraviolet irradiation quantity or the minimum time required by slight blackening at the whole irradiation part 2-4 hours after irradiation) is tested, and calculating the average PFA value by using a formula PFA/MPPD Du (in the formula, MPPD is the MPPD protected by the tested product, and MPPD Du is the MPPD unprotected by the tested product).

6. According to the relation between the PFA value and the sun protection time, the PFA value is less than 2, the protection time is about 2-4 hours when the PFA value is 2-3, the protection time is about 4-8 hours when the PFA value is 4-7, and the protection time is more than 8 hours when the PFA value is more than 8. When the PFA value is greater than 8, the time to protect against UVA is calculated as PFA value 60, and the time to protect against UVA can be estimated from the above information.

7. The experimental calculation results are shown in table 2 below.

TABLE 2

Item	PFA mean value	Resistance to UVA time (minutes)
			Example 1	13	780
Example 2	10	600
			Example 3	8	480
Example 4	11	660
			Example 5	9	540
Example 6	8	480
			Example 7	11	660
Example 8	8	480
			Comparative example 1	4	240
Comparative example 2	8	480

Example 10

The SPF values of the pressed powders of examples 1-8 and comparative examples 1-2 were tested, and the test method was:

4. The continuous spectrum of UVB region emitting near sunlight is 20 + -4 hr, and the ultraviolet ray with wavelength shorter than 280nm and the long-wave ultraviolet ray, visible light and infrared ray with wavelength longer than 320nm are filtered out with proper filter.

5. The test is carried out periodically according to the above conditions, and the results of the periodic tests are recorded, wherein MED (MED refers to the minimum erythema dose) is selected to be a fixed time point within 24 +/-4 hours after the observation exposure, and the average value of SPF is calculated by using the formula SPF (MEDp is the MED protected by the test product; MEDu is the MED unprotected by the test product). And calculating the UVB protection time according to the SPF value.

6. The minimum erythema dose occurred at 15 minutes, due to the different UVB protection times for the individual skin types. Then, the SPF value (min) was calculated from the values (SPF value 15).

7. The experimental calculations are shown in table 3 below.

TABLE 3

Item	SPF mean	Protection UVB time (minutes)
			Example 1	45	675
Example 2	36	540
			Example 3	38	570
Example 4	34	510
			Example 5	31	465
Example 6	32	480
			Example 7	31	465
Example 8	32	480
			Comparative example 1	44	660
Comparative example 2	26	390

Example 11

In order to verify the makeup effect of the invention, the makeup effect naturalness of the pressed powder is tested by making the makeup. 100 volunteers were selected, aged 20-30 years, and divided into 10 groups of 10 persons each. The face was cleaned by the test person for the volunteer, and the face was rested for 20 minutes in the same environment, and then the makeup tests were performed using examples 1 to 8, comparative example 1, and comparative example 2, respectively. Then the effect of the makeup is checked, and whether the conclusion is practical or not is obtained. As in table 4 below.

TABLE 4

Item	Make-up effect	Conclusion
			Example 1	Easy powder taking and natural make-up	Practical
Example 2	Easy powder taking and natural make-up	Practical
			Example 3	Easy powder taking and natural make-up	Practical
Example 4	Easy powder taking and natural make-up	Practical
			Example 5	Easy powder taking and natural make-up	Practical
Example 6	Easy powder taking and natural make-up	Practical
			Example 7	Easy powder taking and natural make-up	Practical
Example 8	Easy powder taking and natural make-up	Practical
			Comparative example 1	Easy powder taking and natural make-up	Practical
Comparative example 2	Powder difficult to take and make-up card powder	Is not practical

Example 12

The total protection time was calculated as the protection low value based on the test data of examples 9-11, the time for protection against UVA and UVB, and the following test results are given, as shown in Table 5.

TABLE 5

As can be seen from Table 5, the sunscreen effect of the light-sensitive titanium dioxide and zinc oxide compounded is better than that of the light-sensitive titanium dioxide and zinc oxide used alone, and the sunscreen effect of the light-sensitive titanium dioxide and zinc oxide compounded according to the ratio of example 1 is better. The addition of the light-sensitive titanium dioxide can enable the use effect of the pressed powder to be more natural, and the three chemical sun-screening agents are compounded with the light-sensitive titanium dioxide and the nano zinc oxide to enable the pressed powder to have a sun-screening effect.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The light-sensitive sunscreen pressed powder is characterized by comprising the following components in percentage by weight: 4-16% of light sensitive titanium dioxide and 1-4% of nano zinc oxide; the photosensitive titanium dioxide comprises nanoscale titanium dioxide, ferric oxide and hydrogenated polydimethylsiloxane.

2. The light sensation sun protection pressed powder of claim 1, wherein the light sensation sun protection pressed powder comprises the following components in percentage by weight: 6-10% of light-sensitive titanium dioxide and 1-3% of nano zinc oxide; preferably, the light sensation sun-protection pressed powder comprises the following components in percentage by weight: 8% of light-sensitive titanium dioxide and 2% of nano zinc oxide.

3. The light-sensitive sun-screening pressed powder according to claim 1 or 2, wherein the light-sensitive sun-screening pressed powder further comprises the following components in percentage by weight: 0.5-2% of ethylhexyl methoxycinnamate, 0.5-2% of isoamyl p-methoxycinnamate and 0.5-2% of diethyl aminooxybenzoyl benzoate; preferably, the light-sensitive sun-proof pressed powder further comprises the following components in percentage by weight: ethylhexyl methoxycinnamate 1%, isoamyl p-methoxycinnamate 1% and hexyl diethylamino hydroxybenzoyl benzoate 1%.

4. The light-sensitive pressed powder of claim 1, wherein the light-sensitive titanium dioxide comprises the following components in percentage by weight: 92.15-96.03% of nano-scale titanium dioxide, 0.97-4.85% of ferric oxide and 3% of hydrogenated polydimethylsiloxane.

5. The light-sensation sun-protection pressed powder according to claim 3, wherein the light-sensation sun-protection pressed powder further comprises the following components in percentage by weight: 30-50% of talcum powder, 10-45% of mica and 2-20% of silica.

6. The light sensation sun protection pressed powder according to claim 5, wherein the light sensation sun protection pressed powder further comprises 4-16% of glycerol tri (ethyl hexanoate).

7. The light sensation sun protection pressed powder according to claim 5, wherein the light sensation sun protection pressed powder further comprises 0.02-0.5% of tocopherol acetate.

8. The light sensation sun cake according to any one of claims 1 to 7, wherein the light sensation sun cake further comprises a colorant, a binder and a preservative.

9. The light-sensitive pressed sunscreen of claim 8, wherein the binder is magnesium stearate.

10. The light-sensitive pressed sunscreen of claim 8, wherein the preservative is a mixture of phenoxyethanol and ethylhexyl glycerin.